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參數(shù)資料
| 型號： | AK4180 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | Touch Screen Controller |
| 中文描述： | 觸摸屏控制器 |
| 文件頁數(shù)： | 9/17頁 |
| 文件大小： | 140K |
| 代理商： | AK4180 |
[ASAHI KASEI]
[AK4180]
<MS0195-E-01>
2003/02
9
ON
YN
VREF+
VREF-
ADC
AIN+
AIN-
XP
YP
XN
ON
b)
Z1-Position Measurement
Differential Mode
touch
ON
YN
VREF+
VREF-
ADC
AIN+
AIN-
XP
YP
XN
ON
a)
Z2-Position Measurement
Differential Mode
touch
Figure 2 Pen Pressure Measurement
Voltage Reference
The AK4180 has an internal 2.5V voltage reference. This reference can be turned ON when PD1 = “1”, and OFF when PD1 = “0”.
This reference is used in the single-ended mode for the battery monitoring, temperature measurement, or for auxiliary input. A
0.1
μ
F or larger capacitor should be connected for stable operation of the VREF circuit. Setting time depends on this external
capacitance, but 400
μ
s or longer time is required if the external capacitance is 0.1
μ
F.
If an external voltage reference is used, PD1 bit should be set to “0”.
Battery Measurement
The AK4180 can measure the battery voltage that is up to 5V directly while the AK4180 operates at 2.7V or 3.3V, etc. The input
voltage is internally divided down by 4. Minimum 5
μ
s is required as tracking time. If the source impedance is large, more
tracking time is required.
R1=7.5K
R2=2.5K
VBAT
ADC
Enable
R0
AIN+
AIN-
VREF+
VREF-
Internal
VREF
PD1
Figure 3 Battery Monitoring
相關PDF資料 |
PDF描述 |
|---|---|
| AK4180VT | Touch Screen Controller |
| AK4182A | Touch Screen Controller |
| AK4182AVN | Touch Screen Controller |
| AK4182 | Touch Screen Controller |
| AK4182VN | Touch Screen Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AK4180VT | 制造商:AKM 制造商全稱:AKM 功能描述:Touch Screen Controller |
| AK418192D | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK418192G | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:32,768 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK418192S | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
| AK418192W | 制造商:ACCUTEK 制造商全稱:ACCUTEK MICROCIRCUIT CORPORATION 功能描述:65,536 x 32 Bit CMOS/BiCMOS Static Random Access Memory |
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